1 /* Simple AES CCM test program, uses the same NIST data used for the FIPS
2 * self test but uses the application level EVP APIs.
5 #include <openssl/bio.h>
6 #include <openssl/evp.h>
8 /* AES-CCM test data from NIST public test vectors */
10 static const unsigned char ccm_key[] = {
11 0xce,0xb0,0x09,0xae,0xa4,0x45,0x44,0x51,0xfe,0xad,0xf0,0xe6,
12 0xb3,0x6f,0x45,0x55,0x5d,0xd0,0x47,0x23,0xba,0xa4,0x48,0xe8
15 static const unsigned char ccm_nonce[] = {
16 0x76,0x40,0x43,0xc4,0x94,0x60,0xb7
19 static const unsigned char ccm_adata[] = {
20 0x6e,0x80,0xdd,0x7f,0x1b,0xad,0xf3,0xa1,0xc9,0xab,0x25,0xc7,
21 0x5f,0x10,0xbd,0xe7,0x8c,0x23,0xfa,0x0e,0xb8,0xf9,0xaa,0xa5,
22 0x3a,0xde,0xfb,0xf4,0xcb,0xf7,0x8f,0xe4
25 static const unsigned char ccm_pt[] = {
26 0xc8,0xd2,0x75,0xf9,0x19,0xe1,0x7d,0x7f,0xe6,0x9c,0x2a,0x1f,
27 0x58,0x93,0x9d,0xfe,0x4d,0x40,0x37,0x91,0xb5,0xdf,0x13,0x10
30 static const unsigned char ccm_ct[] = {
31 0x8a,0x0f,0x3d,0x82,0x29,0xe4,0x8e,0x74,0x87,0xfd,0x95,0xa2,
32 0x8a,0xd3,0x92,0xc8,0x0b,0x36,0x81,0xd4,0xfb,0xc7,0xbb,0xfd
35 static const unsigned char ccm_tag[] = {
36 0x2d,0xd6,0xef,0x1c,0x45,0xd4,0xcc,0xb7,0x23,0xdc,0x07,0x44,
40 void aes_ccm_encrypt(void)
44 unsigned char outbuf[1024];
45 printf("AES CCM Encrypt:\n");
46 printf("Plaintext:\n");
47 BIO_dump_fp(stdout, ccm_pt, sizeof(ccm_pt));
48 ctx = EVP_CIPHER_CTX_new();
49 /* Set cipher type and mode */
50 EVP_EncryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL);
51 /* Set nonce length if default 96 bits is not appropriate */
52 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, sizeof(ccm_nonce), NULL);
54 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, sizeof(ccm_tag), NULL);
55 /* Initialise key and IV */
56 EVP_EncryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce);
57 /* Set plaintext length: only needed if AAD is used */
58 EVP_EncryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_pt));
59 /* Zero or one call to specify any AAD */
60 EVP_EncryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata));
61 /* Encrypt plaintext: can only be called once */
62 EVP_EncryptUpdate(ctx, outbuf, &outlen, ccm_pt, sizeof(ccm_pt));
63 /* Output encrypted block */
64 printf("Ciphertext:\n");
65 BIO_dump_fp(stdout, outbuf, outlen);
66 /* Finalise: note get no output for CCM */
67 EVP_EncryptFinal_ex(ctx, outbuf, &outlen);
69 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_GET_TAG, 16, outbuf);
72 BIO_dump_fp(stdout, outbuf, 16);
73 EVP_CIPHER_CTX_free(ctx);
76 void aes_ccm_decrypt(void)
79 int outlen, tmplen, rv;
80 unsigned char outbuf[1024];
81 printf("AES CCM Derypt:\n");
82 printf("Ciphertext:\n");
83 BIO_dump_fp(stdout, ccm_ct, sizeof(ccm_ct));
84 ctx = EVP_CIPHER_CTX_new();
86 EVP_DecryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL);
87 /* Set nonce length, omit for 96 bits */
88 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, sizeof(ccm_nonce), NULL);
89 /* Set expected tag value */
90 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG,
91 sizeof(ccm_tag), (void *)ccm_tag);
92 /* Specify key and IV */
93 EVP_DecryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce);
94 /* Set ciphertext length: only needed if we have AAD */
95 EVP_EncryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_ct));
96 /* Zero or one call to specify any AAD */
97 EVP_DecryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata));
98 /* Decrypt plaintext, verify tag: can only be called once */
99 rv = EVP_DecryptUpdate(ctx, outbuf, &outlen, ccm_ct, sizeof(ccm_ct));
100 /* Output decrypted block: if tag verify failed we get nothing */
103 printf("Plaintext:\n");
104 BIO_dump_fp(stdout, outbuf, outlen);
107 printf("Plaintext not available: tag verify failed.\n");
108 EVP_CIPHER_CTX_free(ctx);
111 int main(int argc, char **argv)